2. Consider the multiple linear regression model with two independent variables, y = XB +E. Suppose that & ~ N(0.2). The following data was observed. X1 X2 y 4.49 2.92 -5.32 3.04 4.33 -9.24 3.94 4.27 -5.89 2.63 1.92 1.15 4.55 2.47 -1.47 3.88 2.36 1.91 2.92 3.21 -3.99 2.82 4.22 -6.82 3.17 1.80 1.49 2.91 2.35 -0.89 a. Compute the covariance for the least squares regression estimators. That is, find V(B). b. Using the above data. find the estimate of V (B). c. What is the variance for the 1 and 310 residuals d. What is the covariance between the first and third residual